Enter individual folder(s) and execute PowerShell command - powershell

Question

I have many folders with even more subfolders, and as posted in my first question
How to create a powershell script / or windows .bat file for ffmpeg
I want to encode all video files in the folders.
The Script I got from mklement0 works fine but lazy as I am, I was wondering if there was a way to tell the PowerShell to enter folder 1, go to subfolder_1, and execute the ps1 script (would be perfect if it executed in a new powershell instance), wait a certain time and go into subfolder_2
Repeat until no more subfolders available.
Is this possible?
Edit:
The Script I got:
Get-ChildItem *.mkv | where BaseName -notlike '*`[encoded]' | foreach {
ffmpeg -i $_ -c:v libx265 -c:a copy -x265-params crf=25 "$($_.BaseName)[encoded].mkv"
pause
}
What is the reason for the desire to process each subfolder in a separate instance of powershell.exe? by Mathias R. Jessen
Because I want to encode multiple folders at once to save some time.
If there is a way to execute the script in the same PowerShell (as far as my understanding goes, I can only encode one folder at one time if I use the same PowerShell instance)

Answer 1

You could wrap the whole thing in another Get-ChildItem to find all the subdirectories in your main folder, then set-location to that path and run in each of those:
$directories = get-childitem -path "C:\Path\To\Videos\Folder" -Recurse -Directory
Foreach ($dir in $directories) {
Set-Location $dir.fullname
*Run your code here*
}
This would be better than trying to do them all in parallel with different PowerShell instances. Correct me if I'm wrong, but video encoding uses a lot of your computer's resources, so trying to run them in parallel would actually be more of a hindrance.